Perhaps you should try some spelling variations:
"international political economic survey" » "international policy economic survey", "international political economy survey", "international ecological economics survey", "international political economic surveys", "international political economic security", "international political economic success"
"national poverty economic studies" » "national property economic studies", "national forestry economic studies", "national policy economic studies", "national poverty economic status"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("international political economic survey") or ("national poverty economic studies"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("international political economic survey") OR ("national poverty economic studies"))*.
• Removing quotes may allow a broader search: (( international political economic survey ) or ( national poverty economic studies ))*.